<template>
  <div class="full-calendar-body">
    <div class="weeks">
      <strong class="week" v-for="(week, index) in weekNames" :key="index">{{
        week
      }}</strong>
    </div>
    <div class="dates" ref="dates">
      <!-- absolute so we can make dynamic td -->
      <div class="dates-events">
        <div
          class="events-week"
          v-for="(week, index) in currentDates"
          :key="index"
        >
          <div
            class="events-day"
            v-for="(day, index) in week"
            :key="index"
            track-by="$index"
            :class="{
              today: day.isToday,
              'not-cur-month': !day.isCurMonth,
              eventBg: day.events.length > 0,
              clickDay: day.date === selectedDay,
            }"
            @click.stop="eventClick(day.date, day.events, $event)"
          >
            <div class="event-box">
              <p
                class="event-item"
                v-for="(event, index) in day.events"
                :key="index"
                v-show="event.cellIndex <= eventLimit"
                :class="[
                  classNames(event.cssClass),
                  {
                    'is-start': isStart(event.start, day.date),
                    'is-end': isEnd(event.end, day.date),
                    'is-opacity': !event.isShow,
                    'is-work':event.holidayFlag/1==1
                  },
                ]"
              >
                <span v-if="event.holidayName">{{event.holidayName?event.holidayName:''}}</span>
              </p>


            </div>
            <p class="day-number" :class="{ eventDay: day.events.length > 0,'iswork':day.events.length > 0&&day.events[0].holidayFlag/1==1 }" >
              {{ day.monthDay }}

            </p>

          </div>
        </div>
      </div>

      <!-- <div class="dates-bg">
        <div class="week-row" v-for="week in currentDates">
          <div class="day-cell" v-for="day in week"
            :class="{'today' : day.isToday,
              'not-cur-month' : !day.isCurMonth}">
            <p v-if="day.events.length == 0" class="day-number">{{day.monthDay}}</p>
          </div>
        </div>
      </div> -->

      <!-- full events when click show more -->
      <div
        class="more-events"
        v-show="showMore"
        :style="{ left: morePos.left + 'px', top: morePos.top + 'px' }"
      >
        <div class="more-header">
          <span class="title">{{ moreTitle(selectDay.date) }}</span>
          <span class="close" @click.stop="showMore = false">x</span>
        </div>
        <div class="more-body">
          <ul class="body-list">
            <li
              v-for="(event, index) in selectDay.events"
              :key="index"
              :id='index'
              v-show="event.isShow"
              class="body-item"
              @click="eventClick(event, $event)"
            >
              {{ eventTitle}}
            </li>
          </ul>
        </div>
      </div>

      <slot name="body-card"> </slot>
    </div>
  </div>
</template>
<script type="text/babel">
import dateFunc from "./dateFunc";
export default {
  props: {
    currentDate: {},
    events: {
      type: Array,
    },
    weekNames: {
      type: Array,
      default: [],
    },
    monthNames: {},
    firstDay: {},
  },
  watch: {},
  created() {

      // setTimeout(() => {
      //   }, 1000)
        this.handleEvents()
    // this.events = events
  },
  data() {
    return {
      // weekNames : DAY_NAMES,
      weekMask: [1, 2, 3, 4, 5, 6, 7],
      // events : [],
      isLismit: true,
      eventLimit: 1,
      showMore: false,
      morePos: {
        top: 0,
        left: 0,
      },
      selectDay: {},
      eventTitle: "休",
      selectedDay: "",
    };
  },
  watch: {
    weekNames(val) {
      //console.log("watch weekNames", val);
    },
    events(newVal, oldVal) {
      if (newVal.length > 0) {
        this.handleEvents()
      }
    },
  },
  computed: {
    currentDates() {
      return this.getCalendar();
    },
  },
  methods: {
    handleEvents() {
      this.events.forEach((item, index) => {
        item._id = item.id || index;
        (item.start = item.holidayDate),
          (item.end = item.start || item.holidayDate);
      });
      // console.log(this.events)
    },
    isBegin(event, date, index) {
      //  console.log(event)
      let st = new Date(event.start);
      if (index == 0 || st.toDateString() == date.toDateString()) {
        if(event.holidayFlag/1==0){
          return this.eventTitle;
        }else if(event.holidayFlag/1==1){
          return "班"
        }
      }
      return "　";
    },
    moreTitle(date) {
      let dt = new Date(date);
      return (
        this.weekNames[dt.getDay()] +
        ", " +
        this.monthNames[dt.getMonth()] +
        dt.getDate()
      );
    },
    classNames(cssClass) {
      // console.log(cssClass)
      if (!cssClass) return "";
      // string
      if (typeof cssClass == "string") return cssClass;

      // Array
      if (Array.isArray(cssClass)) return cssClass.join(" ");

      // else
      return "";
    },
    getCalendar() {
      // calculate 2d-array of each month
      // first day of this month
      let now = new Date(); // today
      let current = new Date(this.currentDate);

      let startDate = dateFunc.getStartDate(current); // 1st day of this month

      let curWeekDay = startDate.getDay();
      // begin date of this table may be some day of last month
      let diff = parseInt(this.firstDay) - curWeekDay;
      diff = diff > 0 ? diff - 7 : diff;

      startDate.setDate(startDate.getDate() + diff);
      let calendar = [];

      for (let perWeek = 0; perWeek < 6; perWeek++) {
        let week = [];

        for (let perDay = 0; perDay < 7; perDay++) {
          week.push({
            monthDay: startDate.getDate(),
            isToday: now.toDateString() == startDate.toDateString(),
            isCurMonth: startDate.getMonth() == current.getMonth(),
            weekDay: perDay,
            date: new Date(startDate),
            events: this.slotEvents(startDate),
          });
          startDate.setDate(startDate.getDate() + 1);
          // if (startDate.toDateString() == endDate.toDateString()) {
          //   isFinal = true
          //   break
          // }
        }

        calendar.push(week);
      }
      return calendar;
    },
    slotEvents(date) {
      // find all events start from this date
      let cellIndexArr = [];
      let thisDayEvents = this.events.filter((day) => {
        let dt = new Date(day.start);
        let st = new Date(dt.getFullYear(), dt.getMonth(), dt.getDate());
        let ed = day.end ? new Date(day.end) : st;
        // console.log('slotEvt', st, ed, date)
        return date >= st && date <= ed;
      });

      // sort by duration
      thisDayEvents.sort((a, b) => {
        if (!a.cellIndex) return 1;
        if (!b.cellIndex) return -1;
        return a.cellIndex - b.cellIndex;
      });

      // mark cellIndex and place holder
      for (let i = 0; i < thisDayEvents.length; i++) {
        thisDayEvents[i].cellIndex = thisDayEvents[i].cellIndex || i + 1;
        thisDayEvents[i].isShow = true;
        if (thisDayEvents[i].cellIndex == i + 1 || i > 2) continue;
        thisDayEvents.splice(i, 0, {
          title: "holder",
          cellIndex: i + 1,
          start: dateFunc.format(date, "yyyy-MM-dd"),
          end: dateFunc.format(date, "yyyy-MM-dd"),
          isShow: false,
        });
      }

      return thisDayEvents;
    },
    isStart(eventDate, date) {
      let st = new Date(eventDate);
      return st.toDateString() == date.toDateString();
    },
    isEnd(eventDate, date) {
      let ed = new Date(eventDate);
      return ed.toDateString() == date.toDateString();
    },
    selectThisDay(day, jsEvent) {
      this.selectDay = day;
      this.showMore = true;
      this.morePos = this.computePos(event.target);
      this.morePos.top -= 100;
      let events = day.events.filter((item) => {
        return item.isShow == true;
      });
      this.$emit("moreclick", day.date, events, jsEvent);
    },
    computePos(target) {
      let eventRect = target.getBoundingClientRect();
      let pageRect = this.$refs.dates.getBoundingClientRect();
      return {
        left: eventRect.left - pageRect.left,
        top: eventRect.top + eventRect.height - pageRect.top,
      };
    },
    dayClick(day, event) {
      this.$emit("dayclick", day, event);
    },
    eventClick(date, event, jsEvent) {
      // console.log(date,event)
      // if (!event.isShow) {
      //   return
      // }
      // jsEvent.target.classList.add("clickDay");
      this.selectedDay = date;
      jsEvent.stopPropagation();
      let pos = this.computePos(jsEvent.target);
      this.$emit("eventclick", date, event, jsEvent, pos);
    },
  },
};
</script>
<style lang="scss" scoped>
.full-calendar-body {
  margin-top: 20px;
  .weeks {
    font-size: 14px;
    height: 30px;
    line-height: 30px;
    display: flex;
    border-top: 1px solid #dfe6ec;
    border-bottom: 1px solid #dfe6ec;
    border-left: 1px solid #dfe6ec;
    .week {
      flex: 1;
      text-align: center;
      border-right: 1px solid #dfe6ec;
    }
  }
  .dates {
    position: relative;
    .week-row {
      // width: 100%;
      // position:absolute;
      border-left: 1px solid #dfe6ec;
      display: flex;
      .day-cell {
        flex: 1;
        min-height: 40px;
        padding: 4px;
        border-right: 1px solid #dfe6ec;
        border-bottom: 1px solid #dfe6ec;
        .day-number {
          text-align: center;
          font-size: 20px;
          //font-weight: bold;
          height: 60%;
          display: flex;
          justify-content: center;
          align-items: center;
        }
        &.today {
          background-color: #fcf8e3;
        }
        &.not-cur-month {
          .day-number {
            color: rgba(0, 0, 0, 0.24);
          }
        }
      }
    }
    .dates-events {
      // position:absolute;
      position: relative;
      top: 0;
      left: 0;
      z-index: 1;
      width: 100%;
      border-left: 1px solid #dfe6ec;
      .events-week {
        display: flex;
        border-bottom: 1px solid #dfe6ec;
        .events-day:hover {
          background-color: rgba(102, 153, 255, 0.1);
        }
        .events-day {
          cursor: pointer;
          flex: 1;
          min-height: 40px;
          overflow: hidden;
          text-overflow: ellipsis;
          border-right: 1px solid #dfe6ec;
          position: relative;
          &.eventBg {
            /*background-color: #f5f5f5;*/
          }
          &.clickDay {
            background-color: rgba(102, 153, 255, 0.2);
          }
          .day-number {
            text-align: center;
            font-size: 14px;
            //font-weight: bold;
            height: 60%;
            //margin-top: -30px;
            display: flex;
            justify-content: center;
            align-items: center;

            &.eventDay {
              color:#e02d2d;
            }
            &.iswork{
              color:#000;
            }
          }
          &.today {
            background-color: #fcf8e3;
          }
          &.not-cur-month {
            pointer-events: none;
            .day-number {
              color: rgba(0, 0, 0, 0.24);
            }
          }
          .event-box {
            //height: 30px;

            .event-item {
              cursor: pointer;
              text-align: center;
              //font-size: 18px;
              font-weight: bold;
             // background-color: #f43;
              margin-bottom: 2px;
              color: #fff;
              // padding: 2px 5px;
             // height: 100%;
             // line-height: 30px;
             // width:30px;

              white-space: nowrap;
              overflow: hidden;
              text-overflow: ellipsis;

              &.is-start {
                margin-left: 4px;
                // border-top-left-radius:4px;
                // border-bottom-left-radius:4px;
              }
              &.is-end {
                margin-right: 4px;
                // border-top-right-radius:4px;
                // border-bottom-right-radius:4px;
              }
              &.is-opacity {
                opacity: 0;
              }
              &.is-work{
                 background-color: #969799;
                 span{
                   color:#999;
                 }
              }
              span{
                position: absolute;
                bottom: 2px;
                left: 0;
                right: 0;
                margin: auto;
                color:#e02d2d;
                font-size: 14px;
              }
            }
            .more-link {
              cursor: pointer;
              // text-align: right;
              padding-left: 8px;
              padding-right: 2px;
              color: rgba(0, 0, 0, 0.38);
              font-size: 14px;
            }
          }
        }
      }
    }
    .more-events {
      // position:absolute;
      position: relative;
      width: 150px;
      z-index: 2;
      border: 1px solid #eee;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
      .more-header {
        background-color: #eee;
        padding: 5px;
        display: flex;
        align-items: center;
        font-size: 14px;
        .title {
          flex: 1;
        }
        .close {
          margin-right: 2px;
          cursor: pointer;
          font-size: 16px;
        }
      }
      .more-body {
        height: 140px;
        overflow: hidden;
        .body-list {
          height: 120px;
          padding: 5px;
          overflow: auto;
          background-color: #fff;
          .body-item {
            cursor: pointer;
            font-size: 12px;
            background-color: #c7e6fd;
            margin-bottom: 2px;
            color: rgba(0, 0, 0, 0.87);
            padding: 0 0 0 4px;
            height: 18px;
            line-height: 18px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
          }
        }
      }
    }
  }
}
</style>
